package com.itcast.cn.response;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * 解决字节流
 */
@WebServlet("/responseDemo4")
public class ResponseDemo4 extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //设置编码格式
        //response.setContentType("text/html;charset=utf-8");

        //1,读取文件
        try {
            InputStream stream = ResponseDemo4.class.getClassLoader().getResourceAsStream("18.jpg");
            //2，获取输出流
            ServletOutputStream outputStream = response.getOutputStream();


            //3.完成流的拷贝
            byte[] buff = new byte[1024];
            int len = 0;
            while ((len=stream.read(buff))!=-1) {
                outputStream.write(buff,0,len);
            }
            stream.close();

        } catch (Exception e) {
            e.printStackTrace();
        }


    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}
